lastError           error
	lastErrorTime       time.Time
	durationBeforeRetry time.Duration
}

// SafeToRetry returns an error if the durationBeforeRetry period for the given
// lastErrorTime has not yet expired. Otherwise it returns nil.
func (expBackoff *ExponentialBackoff) SafeToRetry(operationName string) error {
	if time.Since(expBackoff.lastErrorTime) <= expBackoff.durationBeforeRetry {

		// Operation already exists
		if previousOp.operationPending {
			// Operation is pending
			return NewAlreadyExistsError(opKey)
		}

		backOffErr := previousOp.expBackoff.SafeToRetry(fmt.Sprintf("%+v", opKey))
		if backOffErr != nil {
			if previousOp.operationName == generatedOperations.OperationName {
				return backOffErr
			}

	if exists {
		// Operation with name exists
		if existingOp.operationPending {
			return NewAlreadyExistsError(operationName)
		}

		if err := existingOp.expBackoff.SafeToRetry(operationName); err != nil {
			return err
		}
	}

	grm.operations[operationName] = operation{
		operationPending: true,
		expBackoff:       existingOp.expBackoff,
	}
	go func() (err error) {